The field Rewrite_time in slow log is not updated in some scenes

## Bug Report

Please answer these questions before submitting your issue. Thanks!

### 1. Minimal reproduce step (Required)

set tidb_slow_log_threshold = 0
select * from t1 where id2>3;
select * from t1 where id1 = 1;

### 2. What did you expect to see? (Required)
The two sqls above have different Rewrite_time

### 3. What did you see instead (Required)
The two sqls above have the same Rewrite_time

### 4. What is your TiDB version? (Required)

Release Version: v6.5.0-alpha-272-g35819ee
Edition: Community
Git Commit Hash: 35819ee43ffd932d8b1dd3c6f8804239dd5ea3aa
Git Branch: master
UTC Build Time: 2022-12-07 07:52:28
GoVersion: go1.19
Race Enabled: false
TiKV Min Version: 6.2.0-alpha
Check Table Before Drop: false
Store: tikv