SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca67320aff5260b4918e9c3fdfcd3a8e1c2891b88ce974350693a863aaca06f9' 
  AND token = 'XWkqknJidfUKwBNtYst4yq4Z+5NmxgUcuXpjE97fsME=' 
  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