minor optimization for get table, operation_id index

[botnumberseven]

I have a node which is set to sync many paranets at the same time, MySQL consumes a decent amount of resources and I noticed this:

It does a lot of UPDATE to get table using operation_id in WHERE clause.
But the table is missing index on operation_id.

I've added index below and it helped to reduce time for these UPDATE to complete, as well as resource consumption a bit.
ALTER TABLE get ADD INDEX idx_operation_id (operation_id);

My get table is ~500k rows, so it makes sense that lack of index is visible now.