Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8b090bb938e4bc7adb3bfccfb10d03908817f66e32ef02bd02832ca5a62e4d3' 
  AND token = 'U6XASWXxXmm0bM/BqVHIXWERmseZD/V0MJxYOcmVY7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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