SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    484, 309, 691, 693, 310, 311, 559, 475, 
    313, 588, 593, 314, 645, 644, 499, 703, 
    316, 595, 533, 511, 534, 517, 515, 516
  )

Query time 0.00091

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": 24,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (484,309,691,693,310,311,559,475,313,588,593,314,645,644,499,703,316,595,533,511,534,517,515,516)"
    }
  }
}