Security jobs in your ZIP code
Asking a relevant question will show your earnestness to get the job.
You could ask about job specific questions such as logging of security incidents, about carrying arms or a baton, the work shifts available for working as well as any other relevant questions specific to the position you are applying.
Most of your questions should be towards understanding your job and your responsibilities and less towards the benefits and perks.
There is nothing wrong with asking the details of the benefits and perks but it should be balanced with your desire to understand more about the job and position you are applying.
If you are talking to a human resource type of person then, you can also ask about the paid-leave policy, about flexible hours, and if there is any chance that they will underwrite any course fees if you want to attend school for security guard position or for other vocational courses.
Many companies might have such programs, which they treat like internships and is a tax write-off. You won’t know unless you ask. Be bold and do not hesitate to ask questions.