Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9d5e5277ebf8f5268460a2af0381d85d6d2975e780479174b5d7214682dd809' 
  AND token = 'IINz8zjSg1IwAr9nCoCAxO1Md6s5N86kyf/1WkaneIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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