Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22d9f9b45c70b7cfe615e0d56b75d5d82dd102f9f2ccadf55515edcad3784ad2' 
  AND token = '3gw9OIJAnhF0D56UbzLKitQP1cCytNdYgXmjFiBIYGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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