Sandbox

SELECT 
  product_id, 
  amount 
FROM 
  cscart_warehouses_sum_products_amount 
WHERE 
  1 
  AND product_id IN (
    276623, 276624, 276625, 276626, 276627, 
    276628, 276629, 276630, 276631, 276632, 
    276633, 276634, 276635, 276636, 276637, 
    276638, 276639, 276640, 276641, 276642
  )

Query time 0.00032

JSON explain

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