SELECT 
  product_id, 
  is_stock_split_by_warehouses 
FROM 
  cscart_products 
WHERE 
  product_id IN (
    180, 179, 136, 139, 191, 192, 111, 211, 
    212, 213, 214, 215, 216, 217, 218, 133, 
    277, 278
  )

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_products",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 18,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (180,179,136,139,191,192,111,211,212,213,214,215,216,217,218,133,277,278)"
    }
  }
}