Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2806094bf2bf7ecfbf58f56fbcbe0d296d1c249483a624587a3fa16a2174e0aa' 
  AND token = 'n/t6rrvHq23gDNOd6bY4AKwJKjaq0cyCQVt/yTf4Kug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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