Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a379905b770fe89839bd135b8d52d55b54ab5a19587895c6a06e61c38c4c79c8' 
  AND token = 'isXf30ZQXr1TBkamvilfFrzAlZw1DUDPtPw+HuY8OFM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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