Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '300504b36c8c8ce7763c8de35b833d6c0c059af9097f297457b77c31c15c1614' 
  AND token = 'UEmnutWETFYWB25nMU0+BwfuZUS3MczIT+FhzsopqrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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