SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7179bf648cbdabe984a120bfb1961dceeb0cf1346eeb3130d2de1eab038a2b95' 
  AND token = 'iIcEI/2x3etw880dEpQPQtgkRhLJBIX1slFhUC+O/yg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

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