Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'cae281156f08520eaff518e93a628a76115d11947e4f24d6d5661f61dd1d5a2f' 
  AND token = 'Lq53/6N8Th6zFqHSfbBYfOAt/MDSFAgODMs++RZPeA0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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