Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f4810fee48e58f6dcc45edf9f9a3906b8634d17d23bd1f22e38127da48b9520' 
  AND token = 'ZzlfslEeFVdETgvwfOe5n1fok4kMn66jwxGfrjEiGuc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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