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SELECT 
  SQL_CALC_FOUND_ROWS products.product_id, 
  descr1.product as product, 
  companies.company as company_name, 
  products.product_type, 
  products.parent_product_id, 
  SUM(
    cscart_multi_decproduct_sales.amount
  ) as sales_amount 
FROM 
  cscart_multi_decproducts as products 
  LEFT JOIN cscart_multi_decproduct_descriptions as descr1 ON descr1.product_id = products.product_id 
  AND descr1.lang_code = 'en' 
  LEFT JOIN cscart_multi_decproduct_prices as prices ON prices.product_id = products.product_id 
  AND prices.lower_limit = 1 
  LEFT JOIN cscart_multi_deccompanies AS companies ON companies.company_id = products.company_id 
  INNER JOIN cscart_multi_decproducts_categories as products_categories ON products_categories.product_id = products.product_id 
  INNER JOIN cscart_multi_deccategories ON cscart_multi_deccategories.category_id = products_categories.category_id 
  AND (
    cscart_multi_deccategories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_multi_deccategories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_multi_deccategories.usergroup_ids
    )
  ) 
  AND cscart_multi_deccategories.status IN ('A', 'H') 
  AND cscart_multi_deccategories.storefront_id IN (0, 1) 
  INNER JOIN cscart_multi_decproduct_sales ON cscart_multi_decproduct_sales.product_id = products.product_id 
  AND cscart_multi_decproduct_sales.category_id = products_categories.category_id 
WHERE 
  1 
  AND companies.status IN ('A') 
  AND (
    products.usergroup_ids = '' 
    OR FIND_IN_SET(0, products.usergroup_ids) 
    OR FIND_IN_SET(1, products.usergroup_ids)
  ) 
  AND products.status IN ('A') 
  AND prices.usergroup_id IN (0, 0, 1) 
  AND products.parent_product_id = 0 
  AND cscart_multi_decproduct_sales.amount >= 1 
  AND products.product_type != 'D' 
GROUP BY 
  cscart_multi_decproduct_sales.product_id 
ORDER BY 
  product asc, 
  products.product_id ASC 
LIMIT 
  0, 24

Query time 0.00153

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "15.47"
    },
    "ordering_operation": {
      "using_filesort": true,
      "grouping_operation": {
        "using_temporary_table": true,
        "using_filesort": false,
        "nested_loop": [
          {
            "table": {
              "table_name": "companies",
              "access_type": "ALL",
              "possible_keys": [
                "PRIMARY"
              ],
              "rows_examined_per_scan": 2,
              "rows_produced_per_join": 1,
              "filtered": "50.00",
              "cost_info": {
                "read_cost": "2.27",
                "eval_cost": "0.20",
                "prefix_cost": "2.47",
                "data_read_per_join": "6K"
              },
              "used_columns": [
                "company_id",
                "status",
                "company"
              ],
              "attached_condition": "(`vishalecarter_multi_dec`.`companies`.`status` = 'A')"
            }
          },
          {
            "table": {
              "table_name": "cscart_multi_decproduct_sales",
              "access_type": "ALL",
              "possible_keys": [
                "PRIMARY",
                "pa"
              ],
              "rows_examined_per_scan": 17,
              "rows_produced_per_join": 5,
              "filtered": "33.33",
              "using_join_buffer": "Block Nested Loop",
              "cost_info": {
                "read_cost": "4.32",
                "eval_cost": "1.13",
                "prefix_cost": "7.93",
                "data_read_per_join": "90"
              },
              "used_columns": [
                "category_id",
                "product_id",
                "amount"
              ],
              "attached_condition": "(`vishalecarter_multi_dec`.`cscart_multi_decproduct_sales`.`amount` >= 1)"
            }
          },
          {
            "table": {
              "table_name": "cscart_multi_deccategories",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "c_status",
                "p_category_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id"
              ],
              "key_length": "3",
              "ref": [
                "vishalecarter_multi_dec.cscart_multi_decproduct_sales.category_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "5.00",
              "cost_info": {
                "read_cost": "5.67",
                "eval_cost": "0.06",
                "prefix_cost": "14.72",
                "data_read_per_join": "756"
              },
              "used_columns": [
                "category_id",
                "storefront_id",
                "usergroup_ids",
                "status"
              ],
              "attached_condition": "(((`vishalecarter_multi_dec`.`cscart_multi_deccategories`.`usergroup_ids` = '') or find_in_set(0,`vishalecarter_multi_dec`.`cscart_multi_deccategories`.`usergroup_ids`) or find_in_set(1,`vishalecarter_multi_dec`.`cscart_multi_deccategories`.`usergroup_ids`)) and (`vishalecarter_multi_dec`.`cscart_multi_deccategories`.`status` in ('A','H')) and (`vishalecarter_multi_dec`.`cscart_multi_deccategories`.`storefront_id` in (0,1)))"
            }
          },
          {
            "table": {
              "table_name": "products_categories",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "pt"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id",
                "product_id"
              ],
              "key_length": "6",
              "ref": [
                "vishalecarter_multi_dec.cscart_multi_decproduct_sales.category_id",
                "vishalecarter_multi_dec.cscart_multi_decproduct_sales.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "100.00",
              "using_index": true,
              "cost_info": {
                "read_cost": "0.28",
                "eval_cost": "0.06",
                "prefix_cost": "15.06",
                "data_read_per_join": "4"
              },
              "used_columns": [
                "product_id",
                "category_id"
              ]
            }
          },
          {
            "table": {
              "table_name": "products",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "status",
                "idx_parent_product_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "vishalecarter_multi_dec.cscart_multi_decproduct_sales.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "8.80",
              "cost_info": {
                "read_cost": "0.28",
                "eval_cost": "0.00",
                "prefix_cost": "15.40",
                "data_read_per_join": "112"
              },
              "used_columns": [
                "product_id",
                "product_type",
                "status",
                "company_id",
                "usergroup_ids",
                "parent_product_id"
              ],
              "attached_condition": "((`vishalecarter_multi_dec`.`products`.`company_id` = `vishalecarter_multi_dec`.`companies`.`company_id`) and (`vishalecarter_multi_dec`.`products`.`parent_product_id` = 0) and ((`vishalecarter_multi_dec`.`products`.`usergroup_ids` = '') or find_in_set(0,`vishalecarter_multi_dec`.`products`.`usergroup_ids`) or find_in_set(1,`vishalecarter_multi_dec`.`products`.`usergroup_ids`)) and (`vishalecarter_multi_dec`.`products`.`status` = 'A') and (`vishalecarter_multi_dec`.`products`.`product_type` <> 'D'))"
            }
          },
          {
            "table": {
              "table_name": "descr1",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "product_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id",
                "lang_code"
              ],
              "key_length": "9",
              "ref": [
                "vishalecarter_multi_dec.cscart_multi_decproduct_sales.product_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.02",
                "eval_cost": "0.00",
                "prefix_cost": "15.43",
                "data_read_per_join": "116"
              },
              "used_columns": [
                "product_id",
                "lang_code",
                "product"
              ]
            }
          },
          {
            "table": {
              "table_name": "prices",
              "access_type": "ref",
              "possible_keys": [
                "usergroup",
                "product_id",
                "lower_limit",
                "usergroup_id"
              ],
              "key": "usergroup",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "vishalecarter_multi_dec.cscart_multi_decproduct_sales.product_id"
              ],
              "rows_examined_per_scan": 2,
              "rows_produced_per_join": 0,
              "filtered": "92.52",
              "using_index": true,
              "cost_info": {
                "read_cost": "0.03",
                "eval_cost": "0.01",
                "prefix_cost": "15.47",
                "data_read_per_join": "1"
              },
              "used_columns": [
                "product_id",
                "lower_limit",
                "usergroup_id"
              ],
              "attached_condition": "((`vishalecarter_multi_dec`.`prices`.`lower_limit` = 1) and (`vishalecarter_multi_dec`.`prices`.`usergroup_id` in (0,0,1)))"
            }
          }
        ]
      }
    }
  }
}

Result

product_id	product	company_name	product_type	sales_amount
12	1000g Pants	CS-Cart	P	4
16	3D Blu-ray Disc™ Player (BD-D7500)	CS-Cart	P	1
23	5.1 Channel Blu-ray 3D Home Theater System	CS-Cart	P	2
1	65" Class (64.5" Diag.) LED 8000 Series Smart TV	CS-Cart	P	2
149	8GB E Series Walkman Video MP3	CS-Cart	P	1
78	adizero Rush Shoes	CS-Cart	P	3
130	Casio DR-210TM	CS-Cart	P	1
126	Casio PRIZM fx-CG10	CS-Cart	P	4
15	Nike Chambray Super Runner Men's Jacket	ACME Corp	P	1
278	T-shirt, Color: White	CS-Cart	P	1
46	The Official SAT Study Guide: Second Edition(TM)	CS-Cart	P	1
45	The Process of Research in Psychology	CS-Cart	P	1
44	U.S. History and Government, Second Edition	CS-Cart	P	1
178	Wilson Jones® 364 Heavy Duty Round Ring Binder with Label Holder, 1", Black	CS-Cart	P	1
248	X-Box One	CS-Cart	P	2