Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e61d78ae2776524956d3848d595769a848af307fb68ead42ed7d7345d6cca0ee' 
  AND token = 'fNSZvom7i5E1tw7VNfUSZzgv69lqiX2J2QWlCEsVsZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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