Production Environment Scenario: The Gateway is OnPremise (Argentina) and its database is an Azure MySQL PaaS (California, USA). The time to start the Gateway is around 1 hour and 20 minutes. Is there a way to reduce the start up time. Latency through distance is expected but it should not be this high.
The setup you are proposing will not work. The gateway and remote database are too far apart. The high latency issues you are having are to be expected.