Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46fb6f830db049c124ef6fb761a22b8511a290c06e1286f51435801a8fc4bbc8' 
  AND token = 'pTKIZ0/tBUtj0k9eRqHzE1ZK+9Qy5WCr5fIkjnhZTaQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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