Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '720f7f7ff0eebfc30e2f6efc9805f020e6db13bb5c13d08c8568c3d9f8df0cae' 
  AND token = '92WuO7qmvyVUjLAxF0i/DJmxIYd73AfPw9GL/S+nEIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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