Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49bc2ce969cec98772bbecb3a812c02c36c48b628888ed20d911d3d5577dc1fb' 
  AND token = '92WUmYT+xEZC5GrlBAqrhnQy9Sp6OOFJy8ibxPmzs1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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