SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e63f17001f644d24f44df398eb03dcefd71f290bd5d95c5302d645614b7809e' 
  AND token = 'ZqpC28EtFb1/vnMylL0eKlrw4pk3+/MIWhntCbzzeJM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

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