Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a5938b7b63d58e0b5dcd62cf20d070bcb75c090808889106cb332ed0d79360c' 
  AND token = 'mOzWP17PFrROf3S52PikW8uwargJRbyEXyDRTLoSd5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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