Slow query > 1000 ms: get_record_by_external_id

During testing loading items on instance record (in holdings accordion) the next slow query has been captured:

EXPLAIN ANALYZE select get_record_by_external_id('89a7ec1c-608f-4d24-90b6-57da21557874', 'instanceId');

Steps to Reproduce:

1. Log into performance environment as folio user
2. Get formatted records using curl for example

   curl -i --verbose --request GET 'https://okapi-fcp1.int.aws.folio.org:443/source-storage/formattedRecords/89a7ec1c-608f-4d24-90b6-57da21557874?identifier=INSTANCE' \
   > --header 'x-okapi-tenant: fs09000000' \
   > --header 'x-okapi-token: ${xokapi-token}' \
   > --header 'Content-Type: application/json' 
   

Expected Results: query should return records < 20 ms
Actual Results: 2650.877 ms

Additional Information:
URL: https://wiki.folio.org/display/FOLIJET/Loading+items+on+instance+record+%28in+holdings+accordion%29+Test+Report

Interested parties:
Everyone