SELECT 
  product_id, 
  amount 
FROM 
  cscart_warehouses_sum_products_amount 
WHERE 
  1 
  AND product_id IN (
    5133, 5349, 4928, 5044, 5030, 5029, 5033, 
    5028, 5031, 5032, 4908, 5099, 5100, 
    5101, 5102, 5344, 5342, 5343, 5103, 
    15724, 15725, 5105, 5106, 4348
  )

Query time 0.00054

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 (5133,5349,4928,5044,5030,5029,5033,5028,5031,5032,4908,5099,5100,5101,5102,5344,5342,5343,5103,15724,15725,5105,5106,4348)"
    }
  }
}