Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '012293a429259c7bd8870cb0cfe11fc92a1a88a42951279d62b90cb683172bfb' 
  AND token = '5zqOZn+5UoJY8xaJQIizeuIVfwISwNFEAOM457ekbCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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