Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '787f2e79d1c34d2f4f76dbc3796a69229ab8ace03bb61e7c68bb683a6f9a66e7' 
  AND token = 'xCOREJpx46ijDp/hjjcj8GXgpFA4S4lmGqLF8TG79GU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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