Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83fa0171d54c10cb54a4284e8b68583feb091e7c32668499200dc0d2c835bbfc' 
  AND token = 'LOKAJYe14H7sHINIWoQyExUvh+uicWMY8qvL5lOU9uk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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