If a user created a personal access token with an expiration date far in
advance, the date would be saved but a 500 error would be shown on
display:

```
PG::DatetimeFieldOverflow: ERROR:  date out of range for timestamp
```

To fix this, since we're comparing dates, we shouldn't use NOW in the
SQL query.  Instead, we use CURRENT_DATE.

This fix is similar to
https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/25806.

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/26306