Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d97b3fde74d3c7cab4ea5f5dbfbf3379f08b7596252bb5048638e120ed11d5a' 
  AND token = 'sF1A2/Wy3ez/l9j5lImYNQ4q4VsJyWEWw1sV/xfvp/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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