Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84a5ed0b25046496b4d234d569569ed84b4eef5ceba5c3f2636c4b9dbbb8d69f' 
  AND token = 'vE9N+6uuonjCkaT8b6+egbuSHpxkMr1FXNgSsrp5HzM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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