Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c316ee6bdd35b3f075fd570236187be282ee9a57079e1cbd22528bdd3094396' 
  AND token = 'uO5TIMOQEc46vgFIp8cRzfLsSCdRAI08cbve4Rg5iKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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