Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cd3dded05c0ed857b8ca6768bfd56e832fefcc921144f0f47176ebdb89bb5c5' 
  AND token = '+jUbU7CATysqRktilP8Hoh7ODXXuoSoYJJa4uETIOfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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