SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '363e43f3463ce48586c57d30c4c3fe41ec36f08cfc9bc2177e9ac7112317a8e2' 
  AND token = 'QvXtef4cLC4S76NnMUYe+L7GLNqnIWavGcTwNiPG98Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

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