Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62fb8d76c95488373a96a00d80f620e5a6b026bba5b62335e03cb5f6fbbf43fb' 
  AND token = '/gLdFsMRxyhT8mEEfgq40sovspWo+7dhBxl/AXMffBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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