Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4296b456f89709101d3c9d45c113e9aaec62e84f010cedc83af39085fdc92b6d' 
  AND token = 'cL7W5U512YMUWY2nwOIjpM0ZtIomzh3g5F01MAVZxzo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}