Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47605eee148e47108fcea77b4d4346006699076def879afa40097c9710b7029f' 
  AND token = 'WiVnHQIxT2IiOWlssT2cC57TfdmeKfw2H8UgQYbo+Bg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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