How do you enable Async and disable the real time key generation

elo experts I have a customer with following issue

As part of upsert transactions in UCM through UCM Transaction Manager, inserts/updates happen in UCM DB.
After integration of UCM with EDQ, key generation process is triggered whenever inserting/updating any record.
And while writing record to DB, it now takes time as it waits to complete the key generation process for the ongoing transaction leading to delay in transaction completion.
This being synchronous in nature currently.
So our expectation is to call this key generation method separately once the record creation/update happens in DB.

This being an asynchronous call, it will not lead to unnecessary delay in upsert transaction to complete