I get hyper anxious whenever I get a call from my office. I am afraid that I might have to work overtime or may be asked to report to office during this pandemic (my office, even though is IT based, does not have work from home provisions unless it is Govt. forced).
I don't think this is specific to your current job. Any job you get, if you're working from home, can do this (I guess maybe they can't call you into work depending on the sector and your specific responsibilities). So I don't think finding another job is a particularly productive course of action, as it won't actually solve your problem.
I think you need to put some perspective into your situation. Does your company often ask you to work overtime? Do they often ask you to work a lot of overtime? Do they pay you for your overtime? How much overtime are you willing to work without being nervous about it? You're not going to get a job where you will be guaranteed to work zero overtime ever, that's just not going to happen, so you may as well get used to it; if that is a dealbreaker for you and makes you anxious, then I'm sorry to say perhaps you're not cut out for the workforce and maybe you should find another life plan which doesn't require you to work (I don't know what such a plan would be, so I'll leave it as an exercise to the reader). Conversely, if you're OK working a little bit of overtime here and there when necessary but you feel like your current job takes it overboard, then maybe you should speak to your manager about how much overtime you're working and ask him if he can do something to cut it down. He'll probably say no, at which time you find another job.
As for not being paid a good salary, this usually indicates that you should find another job. Conveniently, you are working remotely, so scheduling interviews should not be too difficult assuming you can make up the work elsewhere so your current job doesn't know you're interviewing. However, if you don't have a lot of good jobs available in your locale, at least a job with a below-average salary which pays the bills, is better than no job at all, so keep that in mind.