Buying a new or used car with a 724 credit score?

Well I am looking to buy a new or used car (Lexus). And well I have a credit score of 724, but with the credit freeze I am not sure if I can qualify for a reasonable interest rate. Would I need a co-signer or could they in house finance me with a good rate. I need help ASAP because I have someone that is ready to buy the current car that I have.