screen saver and lock not in the same time i want my mac-book (Mojave 10.14.1) to enter screen saver after a certain time but enter lock after longer time. 
is it possible? 

i tried looking for it in screensaver setting and in energy setting without luck. i could only set the screen saver time. 

10x
The setting you want is in preferences -> security and privacy -> general -> require password (some time) after screen sleep or screen saver.

Note that the lock is will happen (some time) after either the screen saver starts or the screen sleeping.