Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '457b964c82e6fab8e00669d5d6d79873cad262103d2c6506de947846e40f40a0' 
  AND token = 'B6wHiGxREwp8bhGnBcSaOa0L8YGES4qTut0Y/hsyRjU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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