Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '200b36550f7d415bac050388ce4822a5818b9454233a19ef22c170e5ec66c049' 
  AND token = 'UocDXrnvV6famod/n5VboH95peT9v/dhtTOUepIfAaM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}