SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4929f0ba3f0f3573d5d4e577a2ec131ba375478149c596810b9c0f68a3320189' 
  AND token = 'y98tk2qxlMt/2E52J/hpcIzBxgpMNZBGueuinY6+ebI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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