Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f4578a1cb40d805b51aff5a7fcee647607835a548540d08e567fb040ed8b93c4' 
  AND token = 'OGIa6dCAfXotqMRQ12A+u3a1oWwGdeH9qOOAfHoYdes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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