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SELECT 
  product_id, 
  amount 
FROM 
  cscart_warehouses_sum_products_amount 
WHERE 
  1 
  AND product_id IN (
    846, 845, 844, 832, 829, 828, 822, 817, 
    816, 662, 814, 806, 805, 804, 803, 802, 
    801, 800, 799, 798, 797, 796, 795, 792, 
    787, 786, 782, 819, 781, 765, 764, 763, 
    762, 760, 758, 752, 751, 750, 749, 747, 
    744, 743, 742, 741, 732, 731, 727, 725
  )

Query time 0.00029

JSON explain

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