Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fa9acd4e827a1f240c1ba7aeeca380cf4a3840b677220cae0f4c100a837803a' 
  AND token = 'LvgeGw+BXlRYBLOjZvs+ZRX97C7jWyPYoe1wTHjvswI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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