Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23d543c890ffdf491e9e4c5f2ed271efc3a2ca3c9868a513d3a588900c8ec0cf' 
  AND token = 'CZuPDo43L+XJLjpOBFLKUdtKbtAsG1lT5DCIerQk5ow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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