Hi Trinko,
Here's what you're facing. On one hand, the raw score isn't bad. It isn't that concerning. From a percentile standpoint, it'll be low but that's to be expected and will only continue to deteriorate as it self-adjusts over the next few years.
However, a 45 is still a good score. If it is good ENOUGH will depend on 2 things.
1) Where do you want to apply? The higher you go, the higher the average GMAT, the higher your score needs to be
2) What your undergrad GPA was and where you went? Was it average from an average school? Then higher might be necessary
Here's the thing. Retaking the GMAT might be the right course of action here if you decide you need to work on this versus alternative transcript. Here's why. Your quant isn't LOW per se. It's average. So if you take a course, you might be able to weave a story around it but that's more useful when improving a negative, not further refining something neutral. Does that make sense? I don't know enough to make a suggestion here but consider what it says about you and your story and let that guide which choice you make.
I'm happy to help if you want to share some more!
Bhavik