Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4ebb52aa3427168bb025646a2636118f603716698fd0d1a3aec2e65388366f96' 
  AND token = 'W0tOspKocGa1TqWnb0QgdEatv3iR0VwhRPL80Ww1BmU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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