Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db89f017e513842cf80959b0af00d4056d67e7d6435bd7286f164be690c40ed7' 
  AND token = '71V1BYKtTKZUWsm5AmmZmeXTOu7gMeXRw6YX5QFu6Hg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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