aws rds create-db-instance
--db-instance-identifier MySQLForLambdaColdStartTest
--db-instance-class db.t2.micro
--engine MySQL
--allocated-storage 5
--db-name cold_start_test
--master-username xxxxxxxxxxxxxxxxxxxx
--master-user-password xxxxxxxxxxxxxxxxxxxx
--backup-retention-period 3
--profile xxxxxxxxxxxxxxxxxxxx

See random_names.sql