SELECT 
  product_id, 
  amount 
FROM 
  cscart_warehouses_sum_products_amount 
WHERE 
  1 
  AND product_id IN (
    189, 192, 168, 188, 203, 196, 3, 165, 167, 
    221, 166, 184
  )

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.0110178,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_warehouses_sum_products_amount",
          "access_type": "ALL",
          "possible_keys": ["PRIMARY"],
          "loops": 1,
          "rows": 1,
          "cost": 0.0110178,
          "filtered": 100,
          "attached_condition": "cscart_warehouses_sum_products_amount.product_id in (189,192,168,188,203,196,3,165,167,221,166,184)"
        }
      }
    ]
  }
}