SELECT 
  tmall_products.* 
FROM 
  tmall_products 
WHERE 
  tmall_products.product_id IN (
    187, 232, 230, 231, 170, 131, 177, 186, 
    185, 179, 233, 152, 160, 237, 235, 122, 
    115, 129, 127, 188
  )

Query time 0.00815

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.035335462,
    "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": 20,
          "cost": 0.035335462,
          "filtered": 100,
          "index_condition": "tmall_products.product_id in (187,232,230,231,170,131,177,186,185,179,233,152,160,237,235,122,115,129,127,188)"
        }
      }
    ]
  }
}