Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '148a667e5f11e8a9f4807e67a05b043a2de54e1588aff6bb6d3d93196abe1e28' 
  AND token = 'ZIW05hn+3yW7so6aznYo1BSlct9GZQU6WqAiPO8/skY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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