Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '230088763427870d668f390562750021cbad3b63e2484addfdacdd3ddb057f7b' 
  AND token = 'Sg+L8GC3KGds62j/GKTPfj0eT5EovqRkofmdSDTunFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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