Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9347cebb7dc54cc70700a23389d81b27cbf8c5d56702023b890b3d03013caf08' 
  AND token = '0mHTSograY2eZ87jKcCwmKR2ZE/pyJ6OZlYD78IfuxI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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