Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adb02a7b1e47ab59f62ad9599eed18300fe3045ffa2e51f9cf72da559d0d9ac7' 
  AND token = 'xrgcicjsz5HBHG/xDZy4Ugw3alf+C/evdwyRPtu78vg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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