Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36aea89583f09c0050b4bbb3e5edd8857cf6614ed592553ccf4f6b027cc63363' 
  AND token = 'kMlZw2d5MqoXg+MtM4f8PupcxYBvnN2gWZXjV4QSuFY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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