select user by user_id

id user_id currency_id currency_id currency_symbol balance last_update
25 AKWEYR 817014 KST 0.000000000000 2019-06-22 17:40:31
26 AKWEYR 1182 BTC 0.0000000000 2019-06-19 17:54:12
31 OWONWR 817014 KST 0.000000000000 2019-06-22 17:40:21
32 OWONWR 1182 BTC 0.0000000000 2019-06-20 17:53:43

I'm looking to display balance when currency_symbol = KSD and user_id = AKWEYR

I have tried a lot of things but nothing works

Are you sure there must be records in your table with currency symbol "KSD"? In the example you included, I only see "KST". So that would explain why you don't get any results. But like jreklund says: it's hard to tell without knowing what you already tried.