SELECT 
  feature_id, 
  feature_type 
FROM 
  cscart_product_features 
WHERE 
  feature_id IN (
    923, 874, 18, 825, 905, 549, 906, 907, 
    915, 839, 829, 908, 840, 879, 834, 831, 
    903, 902, 836, 909, 880, 910, 827, 912, 
    918, 920, 917, 919, 911, 904, 837, 456, 
    922, 875, 913, 901, 921, 914, 548, 830, 
    646, 835, 899, 916, 881
  )

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "32.26"
    },
    "table": {
      "table_name": "cscart_product_features",
      "access_type": "ALL",
      "possible_keys": [
        "PRIMARY"
      ],
      "rows_examined_per_scan": 136,
      "rows_produced_per_join": 44,
      "filtered": "33.09",
      "cost_info": {
        "read_cost": "23.26",
        "eval_cost": "9.00",
        "prefix_cost": "32.26",
        "data_read_per_join": "53K"
      },
      "used_columns": [
        "feature_id",
        "feature_type"
      ],
      "attached_condition": "(`danishecarter_latest`.`cscart_product_features`.`feature_id` in (923,874,18,825,905,549,906,907,915,839,829,908,840,879,834,831,903,902,836,909,880,910,827,912,918,920,917,919,911,904,837,456,922,875,913,901,921,914,548,830,646,835,899,916,881))"
    }
  }
}