SELECT 
  feature_id, 
  feature_type 
FROM 
  cscart_product_features 
WHERE 
  feature_id IN (
    923, 18, 905, 549, 906, 907, 915, 908, 
    903, 902, 909, 910, 912, 918, 920, 917, 
    919, 911, 904, 456, 922, 913, 901, 921, 
    914, 548, 646, 916, 15, 16, 17
  )

Query time 0.00031

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": 30,
      "filtered": "22.79",
      "cost_info": {
        "read_cost": "26.06",
        "eval_cost": "6.20",
        "prefix_cost": "32.26",
        "data_read_per_join": "36K"
      },
      "used_columns": [
        "feature_id",
        "feature_type"
      ],
      "attached_condition": "(`danishecarter_latest`.`cscart_product_features`.`feature_id` in (923,18,905,549,906,907,915,908,903,902,909,910,912,918,920,917,919,911,904,456,922,913,901,921,914,548,646,916,15,16,17))"
    }
  }
}