SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    11917, 11916, 15106, 15071, 11664, 2616, 
    2615, 2552, 11121, 2570, 2617, 2618, 
    2703, 2706, 2708, 2701, 2329, 12686, 
    12687, 11800, 11801, 2738, 2739, 2740, 
    2737, 2845, 2643, 12708, 12707, 2347
  )

Query time 0.00076

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": 30,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (11917,11916,15106,15071,11664,2616,2615,2552,11121,2570,2617,2618,2703,2706,2708,2701,2329,12686,12687,11800,11801,2738,2739,2740,2737,2845,2643,12708,12707,2347)"
    }
  }
}