Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bef680040c3d1b7359960bc24e249541541b233f9f4f709dc3b9037b290fc8f3' 
  AND token = 'pPPBmTvcgzloypfrn1f5Ky6Uu7DCUwNKizuRAaUJNmA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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