QUERY PLAN
Aggregate (cost=16.64..16.65 rows=1 width=8)
-> Sort (cost=16.62..16.62 rows=1 width=159)
Sort Key: tbl_object_change_logs.created_at DESC
-> Seq Scan on tbl_object_change_logs (cost=0.00..16.61 rows=1 width=159)
Filter: ((object_id = 1) AND (object_type = '20008'::smallint))