SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e22dcfc4b33ad5b904b10c5855b616f545fab68ab5be968ee2686400c2a0c511' 
  AND token = 'YPZrxqt/6ibWOTpTMJxFl0t/4teV9kZvQECXsos+wWk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

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