SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '326024df4583a2f3e6d44aaaad9e50be9388162e415485ef67d0ceb516fb3c8e' 
  AND token = 'BsLtsTrijoL/3zvFyOLRqIep40mmlnOPlCu2bs/QmFM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables