SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a2455ff9e1d05a28124d05cbd9290bacda8ed4f9e667c13ab464029010ffffb' 
  AND token = 'MjTs+8vRYwgeShmCGvugSKLP9dB1zsKV0rJlTVJS1eA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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