Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '31a4668bb58a6dee57bd47f047750e4f102468cb42b16253547b24b53ed1d919' 
  AND token = 'otrus8mHJRwT4FglT91w38Ic5FwnhLEC6Q7cL+pCE0U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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