Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c24875217e3a0923ac05b64a86fc27bd439f6ebecdfec7381d6d8f63d962157' 
  AND token = 'XBCdGEcjvr92CPvFtyQcUnOXQN/eoOw98xjJTwL9Il0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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