SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d3bba07a7c57b67816421dc41350a3c1beec6572cfa3bf40ef1768f58e75349' 
  AND token = 'jrsgOAhmxdQo++q3/LAMX+sG9h54d/T7KJXf9JlzFwg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}