Sandbox

SELECT 
  product_id, 
  amount 
FROM 
  cscart_warehouses_destination_products_amount 
WHERE 
  product_id IN (
    797, 796, 795, 792, 787, 786, 782, 819, 
    781, 765, 764, 763, 762, 760, 758, 752, 
    751, 750, 749, 747
  ) 
  AND destination_id = 9 
  AND storefront_id = 0

Query time 0.00014

JSON explain

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