SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    10708, 10709, 10710, 10711, 10712, 10301, 
    10302, 10303, 10304, 9945, 10601, 9727, 
    9728, 9729, 9730, 9731, 9732, 9733, 
    10181, 9734, 9735, 9724, 10370, 10372, 
    10374, 10376, 10377, 10378, 10379, 
    10380, 10381, 10371, 10373, 10375, 
    10387, 10395, 10390, 10394, 10393, 
    10392, 10386, 10389, 10388, 10637, 
    10638, 10639, 10640, 10641, 13013, 
    13014, 13015, 13016, 13017, 13018, 
    13019, 13020, 13021, 13022, 13023, 
    13024, 13025, 13026, 13027, 13028
  )

Query time 0.00129

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": 64,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (10708,10709,10710,10711,10712,10301,10302,10303,10304,9945,10601,9727,9728,9729,9730,9731,9732,9733,10181,9734,9735,9724,10370,10372,10374,10376,10377,10378,10379,10380,10381,10371,10373,10375,10387,10395,10390,10394,10393,10392,10386,10389,10388,10637,10638,10639,10640,10641,13013,13014,13015,13016,13017,13018,13019,13020,13021,13022,13023,13024,13025,13026,13027,13028)"
    }
  }
}