Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64066f4f3b6d2bd4a5d47e84ea0d5317da9c163d0ffbda75c9d8e240383d23dd' 
  AND token = '60vTGw4D4Tz2FDbwNXoQ+yFS8WpKzmZNsQIcQne5vrE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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