Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f1fa1f7847ddf2509f9697e305911c2014f87b7cee6f6b92f2e1cbf44b0a667' 
  AND token = 'BfFb2w9DjeA9Cv1KsAjqLEc2EYXuCb5qRkRDy9ufdQs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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