Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6245bf67752159c2949c6a03030bf501f73e39cd36149c44b5a35fa0422ff0af' 
  AND token = 'JvP8vyUlS/oF4NPTKf1H6No3NV8sTRAMWXIvv0iwCY4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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