Sandbox

SELECT 
  product_id, 
  amount 
FROM 
  cscart_warehouses_destination_products_amount 
WHERE 
  product_id IN (
    525, 521, 517, 513, 507, 497, 492, 489, 
    486, 482, 455, 453, 452, 451, 450, 449, 
    448, 447, 446, 445, 444, 443, 442, 394, 
    378, 377
  ) 
  AND destination_id = 9 
  AND storefront_id = 0

Query time 0.00026

JSON explain

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