Add a unit test too?

Please see for moving all the filtering to the ORM (that way the work gets pushed down at the DB level instead of the API level)
e.g. https://github.com/cloudera/hue/blob/master/desktop/core/src/desktop/api.py

No paranthesis needed

Nice one!
Minor comments below and add minimal unit tests?

help_get_queries --> _get_queries
(convention for private methods in Python)

Actually,
seems like it would make more sense to remove the queries argument and instead of inside:
queries = HiveQuery.objects.using('query')

if filter['text']:

We should avoid any DB specific properties (the whole idea of the ORM is to be compatible with DBs other that psql). Regular prefix search is fine for v1 (and free text search require usability/perf tests/multi db testing... which is pretty much a lot more work to guarantee a stable experience)

Nice!
Nit, bit more explicit: HUE-9492 [query browser] Text search, date filtering and pagination

Could you add a test for the pagination?

def test_search_pagination(self):
      with patch('jobbrowser.apis.hive_query_api.HiveQueryClient.get_queries') as get_queries:
      
      ...
      
      get_queries.return_value = [{.....}, {.....}]

--> test_search_pagination

Move to TestHiveClient()?
Testing the API means whe nwe call the API, e.g. self.client.post("/jobbrowser/api/jobs/queries-hive", content_type='applecation/json', data=filters)

nit: could move it up above line 204

and then below we can reuse
query1.query_id = 'query_id