Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4049d8ff3d071b8dcdef09f71423d402d669069810f107ce83d18b8c485695da' 
  AND token = 'vykE5DZVHBKwiIzTBSysMtjry3GVLoyU+8FelNKtWQM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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