Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '719b526e63381979e130efe27c5dd68538585ed699ecbafb3d969045188217cb' 
  AND token = 'rG80ZtbMXlyzPO3nC6NIEmRf3IANuGeSAf50RaFX8wU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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