SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dab949dd6fb7ad29ab2f3cce703780507569334b91fd28b44113463110f82d71' 
  AND token = 'vyGvYrQHpgVC5O2wYzGwmmDrNYQu2ZA9v20AYqBo2iY=' 
  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