Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '944ab018ecea5b8446bd6c9132358f9cf6fa613233ac3d72790d3ddf2a18f3ba' 
  AND token = '6patooUJ6MqoOvh2M8syHJf/pxbRhRhEgi9ErxUM0sI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}