Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1536b14cc95c610ffa930e56669180b3b31840cc195b724e4ab3efe056ba3c28' 
  AND token = 'yMdCjWeXQWywH+TIq41EhVQ4wAVjWSLHGCnGWxJK35g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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