Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6506aeec74f6355f2fc830405fce106e2e21865945ff92ee89f20ffa214eacf5' 
  AND token = 'SStHVLLgqjzEmydEE9Vn8jpsIrbIs3lsq6oTs0aMkgA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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