Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3695aee6a0800d872e25f092ad709c8707dfa0bf9bee167e2b22949265c997b' 
  AND token = '7E//QQDxqepYKgXZEOXhn8OOUSizaNQrz+qu6OWQhDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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