Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '812547f861f621b973b8a44d8d7dc440a781ef51bd865d7d65602cedff765541' 
  AND token = 'GnFao7Tpu0HfTrya4uYh7dMTFMgQp7MN2b5Wl92yFPg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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