QUERY PLAN
Limit (cost=0.42..204.44 rows=1 width=28)
-> Index Scan Backward using tbl_client_am_change_logs_pkey on tbl_client_am_change_logs (cost=0.42..5509.08 rows=27 width=28)
Filter: ((sales_rep IS NULL) AND (end_at IS NULL) AND (client_id = 1331))