I am trying to understand the below query being run from our developers on read only database which just runs forever.

Table here is partitioned table on partition column trickey per day.

Query is something like below

Select 
   a,
   b,
   c,
   d,
   trickey 
from 
   table 
where 
   (1=1) 
   and (1=1) convert(varchar(10),trickey,112) BETWEEN 20190913 and 20190913

Will above query not eligible for partition key elimination OR how can i improve or tune up the above query?

Also what is the benefit of 1=1 in where clause being used in where clause and does that help or downgrade performance?