Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44cac472bbeb46305dbeb7ad89b2abf55db6ac9a5b11ced5ba5f88d7a5ec4c54' 
  AND token = 'SuTTXdeT98vMHJXIZc9wVb7BD0ApyMfgz7E2ETLwwRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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