Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ed0d5b2465d6507bbb4a64ffe46f3968c2ccd6cb10d7b7e2fb94f24e622905d' 
  AND token = '2NpYRnP6Aos5I77goHNO8zKJYaO/VMYl+lV6c6HFj9g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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