Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1f8bb70541937c0cad73f58bddeb2868e4ef8799e965df05efbb6b291229776' 
  AND token = 'ULFshcf8BarIz0+49m7XaLsV8jK8oa+rt+GNLRVptHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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