Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6b7788b2ea701b91d8fb2a21e95e8c64e80727a4507aa352fcd1e28cee0179ad' 
  AND token = '48FEVnl+6gYG3xxizlWmq6afBALxppCP+wl02yGyY4A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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