Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f7dc128261add0655c2cca745a45b977f82c0084df5a1e34d1e49e375f7f015' 
  AND token = 'FxSTdk+izlVG0F0NyFLXrXhx7GXWD7W4+prCeD2rqik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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