Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc488c5f237c645183ef5f6fde8c3212dbf87eda5b7ce1db1c022274f61e68ab' 
  AND token = '78Ow5/8p6AQPbOor4W5XbsFZt8sScumoi9MH8hKLIOk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}