Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a805e94ec20368d11f0b6ebb4af6a75ce39e9ec5fbeb17424bef18d2615b7bc' 
  AND token = 'o5ZK4ulOgTSTy4kw700dyr8A1LzYer5D4HqzhImoY/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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