Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14a9318e4f64a997733eba678aae7b864b9ad9b9cee02ac851d07c5ca2f4f9e3' 
  AND token = 'Gm2hkKe7FbfolZb5z07KviR5zNtqW5XzJ12H8clSMvk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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