Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02e3819a06014c8e991d75ee6e94ef46f0d97b428b9977f20f8e984fbe847fe8' 
  AND token = '16qWE0r4T8+rtOoFKGTz1qmi7lDAzgPnWBy3o5oHU04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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