SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    6926, 9902, 8753, 9906, 9726, 10430, 
    9498, 9724, 19556, 11649, 9718, 9719, 
    9725, 9722, 9691, 9720, 11624
  )

Query time 0.00074

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_products",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["product_id"],
          "rows": 17,
          "filtered": 100,
          "index_condition": "cscart_products.product_id in (6926,9902,8753,9906,9726,10430,9498,9724,19556,11649,9718,9719,9725,9722,9691,9720,11624)"
        }
      }
    ]
  }
}