SELECT 
  product_id, 
  amount 
FROM 
  cscart_warehouses_sum_products_amount 
WHERE 
  1 
  AND product_id IN (
    276533, 276534, 276535, 276536, 276537, 
    276538, 276539, 276540, 276541, 276542, 
    276543, 276544, 276545, 276546, 276547, 
    276548, 276549, 276550, 276551, 276552
  )

Query time 0.00044

JSON explain

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