SELECT 
  product_id, 
  amount 
FROM 
  cscart_warehouses_sum_products_amount 
WHERE 
  1 
  AND product_id IN (
    5005, 5004, 4863, 5136, 5042, 5025, 5355, 
    5356, 5368, 4995, 4392, 5229, 5429, 
    5430, 5428, 4519, 5050, 5230, 5250, 
    5431, 5231, 5367, 4864, 4865
  )

Query time 0.00059

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_warehouses_sum_products_amount",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 26,
      "filtered": 100,
      "index_condition": "cscart_warehouses_sum_products_amount.product_id in (5005,5004,4863,5136,5042,5025,5355,5356,5368,4995,4392,5229,5429,5430,5428,4519,5050,5230,5250,5431,5231,5367,4864,4865)"
    }
  }
}