Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b472fd0254ac45a98270b3f243e2d4229555b1ad287be7e2cf99d53926a693c1' 
  AND token = 'jYyONwPCy51jZv00a9DJ3HtPvvbd/0N64f0ScPMp8cs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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