QUERY PLAN
Result (cost=8.29..8.30 rows=1 width=1)
InitPlan 1 (returns $0)
-> Index Only Scan using tbl_user_visit_clients_user_client_idx on tbl_user_visit_clients (cost=0.28..8.29 rows=1 width=0)
Index Cond: ((user_id = 1001) AND (client_id = 79))