SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    9984, 9985, 9986, 9987, 9988, 9989, 9990, 
    9991, 9992, 9993, 9994, 9995, 9996, 
    9997, 9998, 9999, 10747, 10748, 10749, 
    10750, 10751, 10752, 9972, 9973, 9975, 
    9976, 9977, 9978, 9979, 10179, 10180, 
    10523, 10073, 10077, 10076, 10086, 
    10085, 10084, 10083, 10082, 10081, 
    10080, 10079, 10584, 10594, 10739, 
    10740, 10741, 10742, 10759, 10760, 
    10761, 10762, 10763, 10764, 10765, 
    10766, 10778, 10779, 10780, 10781, 
    10782, 10783, 10784
  )

Query time 0.00258

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 (9984,9985,9986,9987,9988,9989,9990,9991,9992,9993,9994,9995,9996,9997,9998,9999,10747,10748,10749,10750,10751,10752,9972,9973,9975,9976,9977,9978,9979,10179,10180,10523,10073,10077,10076,10086,10085,10084,10083,10082,10081,10080,10079,10584,10594,10739,10740,10741,10742,10759,10760,10761,10762,10763,10764,10765,10766,10778,10779,10780,10781,10782,10783,10784)"
    }
  }
}