SELECT 
  * 
FROM 
  cscart_languages 
WHERE 
  status = 'A'

Query time 0.00391

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "1.00"
    },
    "table": {
      "table_name": "cscart_languages",
      "access_type": "system",
      "rows_examined_per_scan": 1,
      "rows_produced_per_join": 1,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "0.00",
        "eval_cost": "0.20",
        "prefix_cost": "0.00",
        "data_read_per_join": "216"
      },
      "used_columns": [
        "lang_code",
        "name",
        "status",
        "country_code",
        "lang_id"
      ]
    }
  }
}