SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70026aa0c3c23e3ccf590b9e857646d9735b104bd96671b42c2c332c2bc854ef' 
  AND token = 'VIqJ5qnZ1TCuwZIXbhDe/eR6qhMsmzteGowtnMqpIjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

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