Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '917ec2650a1eb930f59a122b32fa23f58310f503b62131df9b430c77bceb30a8' 
  AND token = 'An8rWy1z5hRx7f4hZJ7Ieh0jh9O3Divz9e2Sof5vJmI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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