Select value with odd chars from mysql - mysql

Question

I have a field in a mysql database with a strange value:
????!"?;%:?*()_+,??????/????\/
The problem is I cannot select it - the following statement returns no rows
SELECT *
FROM `pool_tag` AS `Extent1`
where `Extent1`.`PoolTag`='????!"?;%:?*()_+,??????/????\/'
The value contains "
I was trying also to use rule to duplicate cotation sign, so used this sql
SELECT *
FROM `pool_tag` AS `Extent1`
where `Extent1`.`PoolTag`="????!**""**?;%:?*()_+,??????/????\/"
(note double cotation marks on position 6)
But still no result
The other problem might be, even if I find a specific syntax to handle in sql query directly, I need to select this from Entity Framework (actually the query you saw wa generated by EF)
Any idea how to handle this?
EDIT
I found about mysql escape chars, I checked all one by one (", ', \, %) and I dicovered that % cause the problems.
If I remove it from both field and search value, sql works
If I leave it in field, and try to escape it in sql select, code still don't work
e.g.
SELECT *
FROM `pool_tag` AS `Extent1`
where `Extent1`.`PoolTag`="????!?;\%:?"
does not find the value
????!?;%:?
Any idea why?