Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23d4b87ad20db206444ec8dcf2b6bc45a8405d7e8540bfef059ddc5e96b0fea9' 
  AND token = '1rKHk7Cy4yblTxbjVaisTLvDdio2S4P1PbhZrP7T7X4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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