Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f70395caabf1ebef2b40ffcdd9565b7ef6dd85f11c9b932d7a30263f0308b12e' 
  AND token = '9qdyZTpsdgtZT0DNnojsPELvDwGwttzkfIFDguxNjWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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