Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '009ed5ffb705eb260281d43edb798d83c5d1bac74cd56d19f8fa362e0f991be4' 
  AND token = 'pP+Iz7DdTz7AQQ7K1XfOsfpCihRDzrOK+/+wtBGiAK8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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