Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5fcc899d8f8ab8b599573826f5550739e929e899d3c2c95a4d4bf342440b8c27' 
  AND token = 'uWrYiLkoIb0z4xoiZvlkTS52fdI7WnZ0mtG9ONtE4l4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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