Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a963313263e38bddfa827aa03228a16c05716719a5ef451d4725780e626919b8' 
  AND token = 'SCBqzzjOhWoro2msRcWzC0878aNxVcF5ah5W7uX8YUM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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