SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '7facf88d7f5139068204e942f1a7467d37f77bc3457ac3009bf550880464395d' 
  AND token = 'wYUMTapCZ398oRPja22GAlioknH8ZCh+VNd2U8Hcq5A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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