Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47d9e67f7c2aac5ec6a36f205ad5d7802f7820ccb6f9d65390a145367749dbe2' 
  AND token = '1+CBEz8g0TmhM4jMJQcdeKZMMyWgb9GkskR/PfU6X20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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