SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    9804, 9809, 9810, 9811, 9812, 9807, 9808, 
    9683, 10455, 10456, 10454, 10453, 10452, 
    10451, 10450, 10449, 10448, 10447, 
    12691, 12692, 12693, 12694, 12695, 
    12696, 12697, 12698, 12699, 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, 
    10744, 10745, 10746, 9905, 10168, 10041, 
    10643, 10606, 10094, 10097, 12703
  )

Query time 0.00218

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 (9804,9809,9810,9811,9812,9807,9808,9683,10455,10456,10454,10453,10452,10451,10450,10449,10448,10447,12691,12692,12693,12694,12695,12696,12697,12698,12699,10370,10372,10374,10376,10377,10378,10379,10380,10381,10371,10373,10375,10387,10395,10390,10394,10393,10392,10386,10389,10388,10637,10638,10639,10640,10641,10744,10745,10746,9905,10168,10041,10643,10606,10094,10097,12703)"
    }
  }
}