Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30832605cdc2953e9158440746134a043163d13fd0f0a416713e923ad742dd1d' 
  AND token = 'NUaSSMoVwJiEVqqCb4fDMa7EKg/1JsNL65qxRhD9LOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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