Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42a4fea98ed907781330986cd24203ec6e18651f216148b428cadf9c79c2e8bc' 
  AND token = 'BsAK9OEef57ZQeZ+0lGtjRSQVqHLA9adZ67dEn7sT4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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