Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ac00a59e34fd32c386ccdff261e8db2c87aa44fb6967b08954befd29851d9d0' 
  AND token = 'sHEDdzOo36NduDRwSo3CwHB0hEiyjzuzDMVJTEmfOI8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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