Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e41c260bf4142ec271534812d92f464b464d6d88cdb514d825005ff635211fdf' 
  AND token = 'igIefcoSDt7AoKJRc1OvubRwUyyCf9YDr3go2j7wOPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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