Sandbox

SELECT 
  product_id, 
  amount 
FROM 
  cscart_warehouses_sum_products_amount 
WHERE 
  1 
  AND product_id IN (
    846, 832, 829, 828, 817, 816, 787, 819, 
    781, 760, 758, 752, 751, 750, 749, 747, 
    732, 731, 725, 724, 723, 717, 707, 673
  )

Query time 0.00016

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "Impossible WHERE noticed after reading const tables"
  }
}