Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53a780195e78f25df0fc6b445361562f1f3be7a10e2dc6a4008c6e18e8bf5481' 
  AND token = 'daPnKcBjZA6J5ALd0gm+F4UIUkFV8KOZ7IeKcSdr6ao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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