sql construct condition with if statement mysql -

i want construct such sql condition. have table car, has such fields id_status, id_category , storage_address. need select cars id_status in (2,4) , if id_category = 4 need check field storage_address not null or empty. how make it? should use sql if statement? need like:

select * car id_status in (2,4) , if(id_category = 4,storage_address not null,'1=1') 

try this:

select * car id_status in (2,4) , if(   id_category = 4,   storage_address not null,   1 ) 

simply put, not need string '1=1', plain 1 truthy value.

or can

select * car id_status in (2, 4) , (   id_category != 4   or storage_address not null )