SELECT 
  tmall_products.* 
FROM 
  tmall_products 
WHERE 
  tmall_products.product_id IN (
    114, 108, 104, 121, 103, 112, 97, 116, 
    111, 110, 118, 123, 119, 100
  )

Query time 0.00815

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.024961306,
    "nested_loop": [
      {
        "table": {
          "table_name": "tmall_products",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["product_id"],
          "loops": 1,
          "rows": 14,
          "cost": 0.024961306,
          "filtered": 100,
          "index_condition": "tmall_products.product_id in (114,108,104,121,103,112,97,116,111,110,118,123,119,100)"
        }
      }
    ]
  }
}