Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cd4703f4b8879430116eba01076a65f60db0dcd9ef93586e9fad316f7fc5fe3' 
  AND token = 'JnKIYVQsD5XVjZofZIALiS0CV14lEEScnx8FYcRsnN4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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