Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9baace0a628f23212c88cc0ad970683a70e95b1dc5f57de4a20f77a772068e9d' 
  AND token = 'CNOMrB5Sm3ucF7XecWNcx2dcX8YP8vYwRnZMXY9/AxM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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