Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd77912b1d2eceaf88a39090a2adf3814ac8877da7e8f53d96d8ee1252221c2c7' 
  AND token = '9EfZ9TGdz4+ipS6vLY+NqZGC9QdC1RDm/L8PZefIlJk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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