Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c933f7a118d719dbb05750134a878b188d3cead01391e4228b6dfe2244ec4e97' 
  AND token = 'YJiIDOXqZyTrpZzU/do4EMSi8fj0UcamWMg+jdyMooY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}