SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    61329, 61326, 61624, 61322, 61960, 61954, 
    63431, 62977, 62222, 62986, 61620, 
    61621, 64468, 64470, 63755
  )

Query time 0.00056

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": 15,
      "filtered": 100,
      "attached_condition": "cscart_products.product_id in (61329,61326,61624,61322,61960,61954,63431,62977,62222,62986,61620,61621,64468,64470,63755)"
    }
  }
}

Result