Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3dbf8f8a72ef8da4a803ad847e648a4700dc0ddc7202fc086d71df78594127b7' 
  AND token = 'l7FJZDprVvxU0T8E8nNDIjSq5fKUE3CxDoiJdyhkT80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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