Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9baf2bd9c22d66576c9e265c79775c9e28201c24f4b885b937275c8b8a908443' 
  AND token = '/yHfg1nmsRCzUIBzMVz6PWI3Cfy5Cmpd8xkS6KxA/JM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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