Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3e533353cb38e1e0f86923012640326bd252c92ca0a1ef933deea0d23b28947' 
  AND token = 'vS8jV0nRUVHeFFeAIq6eSRQuwQwmSVWrPQ/iG0GEK80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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