Mysql 此更新查询是否有任何可能的重写选项

我有一个问题，我不知道如何为它做解释计划.所以我所拥有的是临时表创建查询和表 struct .

create temporary table if not exists tmp_staging_task_ids as
         select distinct s.usr_task_id
           from ue_events_staging s
          where s.queue_id is null
          limit 6500;

以上 Select 查询解释计划；

*************************** 1. row ***************************
           id: 1
  select_type: SIMPLE
        table: s
   partitions: NULL
         type: ref
possible_keys: ue_events_staging_queue_id,usr_task_id,queue_id_usr_task_id,queue_id_app_id
          key: queue_id_usr_task_id
      key_len: 303
          ref: const
         rows: 17774428
     filtered: 100.00
        Extra: Using where; Using index; Using temporary

-oh my 天.

update ue_events_staging s
         join tmp_staging_task_ids t on t.usr_task_id = s.usr_task_id
          set s.queue_id = 'queue_id';

表 struct ；

Create Table: CREATE TABLE `ue_events_staging` (
  `id` bigint NOT NULL AUTO_INCREMENT,
  `queue_id` varchar(100) DEFAULT NULL,
  `usr_task_id` bigint NOT NULL,
  `app_id` bigint NOT NULL,
  `platform` tinyint NOT NULL,
  `capture_time` bigint NOT NULL,
  `input_type` varchar(50) NOT NULL,
  `type` varchar(100) NOT NULL,
  `event_type` varchar(10) NOT NULL,
  `screen` varchar(100) NOT NULL,
  `object_name` varchar(255) DEFAULT NULL,
  `app_custom_tag` varchar(255) DEFAULT NULL,
  `exception_class_name` varchar(250) DEFAULT NULL,
  `exception_tag` varchar(250) DEFAULT NULL,
  `non_responsive` tinyint(1) DEFAULT '0',
  `is_first` tinyint(1) DEFAULT '0',
  `is_second` tinyint(1) DEFAULT '0',
  `is_last` tinyint(1) DEFAULT '0',
  `is_quit` tinyint(1) DEFAULT '0',
  `x_coordinate` double DEFAULT NULL,
  `y_coordinate` double DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `ue_events_staging_queue_id` (`queue_id`),
  KEY `usr_task_id` (`usr_task_id`),
  KEY `screen` (`app_id`,`platform`,`screen`),
  KEY `app_id_queue_id` (`app_id`,`queue_id`),
  KEY `queue_id_usr_task_id` (`queue_id`,`usr_task_id`),
  KEY `queue_id_app_id` (`queue_id`,`app_id`)

请判断大约需要3.5k秒并导致加载的可能性.