Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16a42d64ab63f4949850efe496f936b90c9d48976d0f452ce11d364bd883df3e' 
  AND token = '/Gvkecegm4s3nUUOFI4UqrEslLX+ZFLijL9bTxXDlYk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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