Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '766ab9214b79246a5027c264781f6db0c7957f4b722c2f2b4a81a961c315225b' 
  AND token = 'sSUS/yFAk0blV+hOiKlk51+VM0d0xBJkiNBxbiNZA+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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