Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab80ea0a54a81d59812ffea011bcaa6a1d1f8d3d7bccac8ea2ead09e20954f8c' 
  AND token = 'sw3PJ+1hnUz3zQiZSWN1G+5AbN+dMCBz7nF57Bmj8u0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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