It runs well on budget machines (1050ti with a Pentium etc.) so that qualifies it as well optimized. Also it came out 5 years ago, for the soon to be previous gen consoles (and on the previous ones before as well, mind you)
My CPU is a serious bottleneck, though. I have a reasonable GPU but the CPU is bad. MW2 only runs at like 30fps on lowest setting and resolution and it is the CPU's fault.