Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa3193cc199aee7ce85e8bb51d76eb847c6167eefa2acc4cd7acd1b00c778f89' 
  AND token = 'feRdc7fG56fgQG95JNxK6YqTytozcZSDvarQWzMWjqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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