Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebb1157c7988cc88dec334e53a021833c4e178fd88ffa3e702077a93f0cb1be2' 
  AND token = 'KSPEemEEnpoFw4ABnsCaG+nTLVVSBQr63jmOqf9Jjtw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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