Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0aa5d54142119d486226927ac90db1a2825af4a0589b7e09c0c0527f6058f295' 
  AND token = '4mU65W28D3xiZXkKhVTC5JMrh3tMZmAWT/F5+7P3D3Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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