Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80b829ede6e1fb63f3c3f75b226ff80ebfa7bd64316a2f2bf8ec80eb436fb0f5' 
  AND token = '1//vuWdEEiSqgLaEzGJxgBo5SHEtUFgO7A3zx8YRePE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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