Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b6cc707fb26a698040eabbe5a00d41b4fee045e21ca44ab8c0b54c4a0ea6be6' 
  AND token = 'L7XG2OFxOe6ZaM/54j4Lu9XHycJnVvQ1BdhJhxh5lXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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