Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f9cc543d679815bdab43716217d295eb291de9a0c541b8b5a81682b6b168408' 
  AND token = 'DbHIPFqUG0LwunyknPPIdJR9PUES9RsMXkWys9QZZA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00073

JSON explain

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