Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ce1e3ea6415bfb980ad7520ac7e9a41fdbd67546891fedead4c4ea355166c61' 
  AND token = '24B5IH7u7395HTzzBndY23Z6CFIxfgX0m3n3rwH6wQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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