[CX] Index intersection query hangs when issued from Analytics workbench

This issue was discovered while verifying fix for MB-32662. 

Steps to reproduce are copied from there:
1. 1 node cluster having kv & analytics service
2. Install travel-sample bucket
3. create dataset ts1 on `travel-sample`
4. create index idx4 on ts1(callsign:string);
5. create index idx5 on ts1(`type`:string);
6. connect link Local;
7. select callsign,`type` from ts1 where callsign="MILE-AIR" and `type`="airline";

The query needs to be issued from the Analytics workbench. The workbench requests operator profiling ("profile":"timings" option in the request) which makes this query hang. Without operator profiling the query runs fine (cbq or curl).