Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d3e994aeed4a867c9dd0a11d7eb13e1beb468f02ce2f8ffd343245a9c7b22b8' 
  AND token = '9CjYsM32fwmXUJzjVbtaPdzdoR9ZsbsIEdp+7APetkU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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