OK – the snakes are going to want to be somewhere warm/dark. Your skirting boards are going to be prime suspect.
I seriously doubt a pair of small corn snakes are going to get anywhere too scary & I hope your neighbours would know that they aren’t going to bite.
I think leaving their normal food out for them in a trap of some sort would do the job of re-capturing them.
I must ask – how did they escape?
I’ve kept a lot of animals in the past and the only ones that managed to escape were gerbils. Took weeks to recapture those!