QUERY PLAN
Update on tbl_unread_comments (cost=0.00..6623.08 rows=1 width=26)
-> Seq Scan on tbl_unread_comments (cost=0.00..6623.08 rows=1 width=26)
Filter: (((object_type)::text = '21'::text) AND (object_id = 588) AND (remind_user_id = 1001))