Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89b49efa432fb03030232c0437f4a6d0f0da8504aa6794bc3f3b9f32eb0baa16' 
  AND token = '8CdrcQHBQxQw0Xy0hiH9NsqD2w69ec5gPwBpoxdhTfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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