QUERY PLAN
Limit (cost=1.19..1.20 rows=4 width=24)
-> Sort (cost=1.19..1.20 rows=4 width=24)
Sort Key: last_visit_at DESC
-> Seq Scan on tbl_visit_object_histories (cost=0.00..1.15 rows=4 width=24)
Filter: (user_id = 5493)