But you certainly have better to put in place a replication (hot real time backup) schema, it'll consume as many cpu and disk but the load will be equal (no peak) and it's better than hour.
Under the hood Laravel probably uses mysql or postgresl replication, as far as I'm concerned I use directly base replication (postgresql) because I'm new to Laravel.
Settings this config in Laravel should answer to your question since you have 2 DB on 2 different hosts.