Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4acdcd3e2ab0c2f4dec3ba01bd0c8557f81d906825fb9799cc34814ec24cccc0' 
  AND token = 'wGVqTB+6PAbeDr5WOS1u14+4crJw43eAbg7HVTT9Pt8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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