Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9abb2061fc105ea39c35b48ab7f4e09e5bf977b33d2994b6d39a659f7c7a5eb' 
  AND token = 'qD42XvF4T9pNUhsjrjRUsdXM0TrwhRMrV1qVgsaP0EM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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