Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e72cb07f2f62d202a35b2ecde0f6967ab7e99f5353989253565c7135ee2bb05' 
  AND token = '40EMC6hQs+n6tSuNMSYbJJY+OirlRtj7cdUl+UWnw30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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