Sandbox

SELECT 
  product_id, 
  amount 
FROM 
  cscart_warehouses_destination_products_amount 
WHERE 
  product_id IN (
    242, 243, 78, 79, 80, 81, 82, 83, 84, 85, 
    86, 87
  ) 
  AND destination_id = 7 
  AND storefront_id = 0

Query time 0.00020

JSON explain

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