Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '43bafa7ea4a17f8f3686c9721afc2f84ffbc8effec76827672b8a5da925517fd' 
  AND token = 'YKzNtSrf2TUMSDftI3fVRwhvj43UpJu+loMs84ozvLI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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