Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40d35329bbc196f91bb71b130d77ca5c820ef4fb386ab93ad306c35819cb880f' 
  AND token = 'Xy8zHsqOcDURmOgOAZhZxNYuNLcn52QkR6SxQmgtR6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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