How to deal with a surplus of space in a filter dropdown?

I'm redesigning a filter feature for my company, and I'm running into a problem where I have a surplus of space relative to the small amount of UI elements (see image). I initially thought about just spreading out the elements, but that disrupts the whole Gestalt thing about proximity.
Then I tried bracketing it on either side with space, but it just looks odd. Any ideas on how to mitigate this? Thank you!