Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e22a5fefb39cfe1e8def57b97dbce4205863ceaf9c873bc0cc8806e2688cd2c' 
  AND token = 'UmRM96QPenfND/YlclcoDruYUeZiASDBPYeFL8RqVxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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