Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d055493468632c8eaf145bec196c5ea03f72cfa233a7335352551ad05d859af' 
  AND token = 'R598fWO9mYDz+Lx+YdSxsFI7VHk+q3jeutXqGmA94kg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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