SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1562d9fc960a71bde3cd9c79191a1c1efaf912f2f488dc7b5275ae6578769591' 
  AND token = 'XXMQvM6wWU+zjShQ0rrIF9QsSSgNNieEB/sj1VS2j3U=' 
  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