Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a824dee6b669ba80237f77ea103fb099e448028d36bf90bb24eda06290c39389' 
  AND token = 'mOVRQ6eXdDqNKfqcTVulxrukvkVCWXoEW1Y7HfZVgPw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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