Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b2bd6777dd506a2e0584c774ba41c217342afee9d6a4d5f409e05f6beab5b83' 
  AND token = 'hs9UQ9bei5mmOTEG0wenJqZ1cCJT7U/5SeoZzE1asto=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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