SELECT 
  COUNT(
    DISTINCT(
      cscart_june_setupcompanies.company_id
    )
  ) 
FROM 
  cscart_june_setupcompanies 
  LEFT JOIN cscart_june_setupcompany_descriptions as company_descr ON company_descr.company_id = cscart_june_setupcompanies.company_id 
  AND company_descr.lang_code = 'ru' 
  LEFT JOIN cscart_june_setupcompany_descriptions ON cscart_june_setupcompany_descriptions.company_id = cscart_june_setupcompanies.company_id 
  AND cscart_june_setupcompany_descriptions.lang_code = 'ru' 
  LEFT JOIN cscart_june_setupabsolute_rating AS absolute_rating ON absolute_rating.object_id = cscart_june_setupcompanies.company_id 
  AND absolute_rating.object_type = 'company' 
  LEFT JOIN cscart_june_setupvendor_plan_descriptions ON cscart_june_setupcompanies.plan_id = cscart_june_setupvendor_plan_descriptions.plan_id 
  AND cscart_june_setupvendor_plan_descriptions.lang_code = 'ru' 
  LEFT JOIN cscart_june_setupseo_names ON cscart_june_setupseo_names.object_id = cscart_june_setupcompanies.company_id 
  AND cscart_june_setupseo_names.type = 'm' 
  AND cscart_june_setupseo_names.dispatch = '' 
  AND cscart_june_setupseo_names.lang_code = 'en' 
  LEFT JOIN cscart_june_setupdiscussion ON cscart_june_setupdiscussion.object_id = cscart_june_setupcompanies.company_id 
  AND cscart_june_setupdiscussion.object_type = 'M' 
  LEFT JOIN cscart_june_setupdiscussion_posts ON cscart_june_setupdiscussion_posts.thread_id = cscart_june_setupdiscussion.thread_id 
  AND cscart_june_setupdiscussion_posts.status = 'A' 
  LEFT JOIN cscart_june_setupdiscussion_rating ON cscart_june_setupdiscussion.thread_id = cscart_june_setupdiscussion_rating.thread_id 
  AND cscart_june_setupdiscussion_rating.post_id = cscart_june_setupdiscussion_posts.post_id 
WHERE 
  1 
  AND cscart_june_setupcompanies.status = 'A'

Query time 0.00084

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "12.17"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "absolute_rating",
          "access_type": "system",
          "possible_keys": [
            "PRIMARY"
          ],
          "rows_examined_per_scan": 0,
          "rows_produced_per_join": 1,
          "filtered": "0.00",
          "const_row_not_found": true,
          "cost_info": {
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            "data_read_per_join": "112"
          },
          "used_columns": [
            "object_id",
            "object_type"
          ]
        }
      },
      {
        "table": {
          "table_name": "cscart_june_setupcompanies",
          "access_type": "ALL",
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          "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",
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            "plan_id"
          ],
          "attached_condition": "(`vishalecarter_june_setup`.`cscart_june_setupcompanies`.`status` = 'A')"
        }
      },
      {
        "table": {
          "table_name": "company_descr",
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          "possible_keys": [
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          "key": "PRIMARY",
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          "ref": [
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          "cost_info": {
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      },
      {
        "table": {
          "table_name": "cscart_june_setupvendor_plan_descriptions",
          "access_type": "eq_ref",
          "possible_keys": [
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          ],
          "key": "PRIMARY",
          "used_key_parts": [
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          ],
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          "ref": [
            "vishalecarter_june_setup.cscart_june_setupcompanies.plan_id",
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          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 1,
          "filtered": "100.00",
          "using_index": true,
          "cost_info": {
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            "data_read_per_join": "792"
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          "used_columns": [
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        }
      },
      {
        "table": {
          "table_name": "cscart_june_setupseo_names",
          "access_type": "ref",
          "possible_keys": [
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            "dispatch"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
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          "key_length": "206",
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          ],
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          },
          "used_columns": [
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          "attached_condition": "<if>(is_not_null_compl(cscart_june_setupseo_names), (`vishalecarter_june_setup`.`cscart_june_setupseo_names`.`object_id` = `vishalecarter_june_setup`.`cscart_june_setupcompanies`.`company_id`), true)"
        }
      },
      {
        "table": {
          "table_name": "cscart_june_setupdiscussion",
          "access_type": "eq_ref",
          "possible_keys": [
            "object_id"
          ],
          "key": "object_id",
          "used_key_parts": [
            "object_id",
            "object_type"
          ],
          "key_length": "6",
          "ref": [
            "vishalecarter_june_setup.cscart_june_setupcompanies.company_id",
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          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 1,
          "filtered": "100.00",
          "cost_info": {
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            "prefix_cost": "4.77",
            "data_read_per_join": "24"
          },
          "used_columns": [
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            "object_id",
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          ],
          "attached_condition": "<if>(is_not_null_compl(cscart_june_setupdiscussion), (`vishalecarter_june_setup`.`cscart_june_setupdiscussion`.`object_id` = `vishalecarter_june_setup`.`cscart_june_setupcompanies`.`company_id`), true)"
        }
      },
      {
        "table": {
          "table_name": "cscart_june_setupdiscussion_posts",
          "access_type": "ref",
          "possible_keys": [
            "thread_id",
            "thread_id_2"
          ],
          "key": "thread_id",
          "used_key_parts": [
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          ],
          "key_length": "3",
          "ref": [
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          ],
          "rows_examined_per_scan": 6,
          "rows_produced_per_join": 6,
          "filtered": "100.00",
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          },
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          "attached_condition": "<if>(is_not_null_compl(cscart_june_setupdiscussion_posts), (`vishalecarter_june_setup`.`cscart_june_setupdiscussion_posts`.`status` = 'A'), true)"
        }
      },
      {
        "table": {
          "table_name": "cscart_june_setupdiscussion_rating",
          "access_type": "eq_ref",
          "possible_keys": [
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          ],
          "key": "PRIMARY",
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          ],
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          "attached_condition": "<if>(is_not_null_compl(cscart_june_setupdiscussion_rating), (`vishalecarter_june_setup`.`cscart_june_setupdiscussion_rating`.`thread_id` = `vishalecarter_june_setup`.`cscart_june_setupdiscussion`.`thread_id`), true)"
        }
      }
    ]
  }
}