time search on date not working

hi
i want to get all item From '2023-01-31 07:00:00' until '2023-01-31 07:30:00' for example:

i search looks like: `search=start_at:'2023-01-31 07:00:00', '2023-01-31 07:30:00'&searchFields=start_at:between` and in config file add between condition but not working! search on hour and minute not work! return all days!