Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '532f231f0806a8ff77ab12e1704266d73219cd786cbec12a76e1eb08ff0d9ce1' 
  AND token = 'gebAVVR10xDNHNrtHS9SCw+VfbSuhMp41jZaxHCH4aY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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