SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1159d0bf8b50c8852284b92632f955be0a9b249b0d9c22a33c64597a99010270' 
  AND token = 'ziMAcj4T+FGhPYz+Q56+EifBuONKOYlzHkgZsCrY4PM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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