For what it's worth, that is what countries with competent security do (Israel, China whenever/wherever there are security concerns), multiple stages of securit

For what it's worth, that is what countries with competent security do (Israel, China whenever/wherever there are security concerns), multiple stages of security checks (but of course the earlier ones are designed to minimise queuing to avoid that exact issue). Typically there will be one security check on the road before cars enter the airport (this can be just a drive-by check for anything suspicious), then either scanner or explosive chemicals check at the entrance doors. Also, the area in front of the security check is arranged with a large "buffer space" not allowing anyone without a boarding pass to get close to the security check lines (and again with guards looking out for anything suspicious).