SETEX key seconds value
Set key to hold the string value and set key to timeout after a given number of seconds. This command is equivalent to executing the following commands:
SET mykey value EXPIRE mykey seconds
SETEX is atomic, and can be reproduced by using the previous two commands inside an MULTI / EXEC block. It is provided as a faster alternative to the given sequence of operations, because this operation is very common when Redis is used as a cache.
An error is returned when seconds is invalid.
"OK" redis> TTL mykey (integer) 10 redis> GET mykey "Hello"
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https://redis.io/commands/setex