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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '182ffc73d5106647f210404f6df783ca8fdc8fb9a3957b9eb6d173b1e55b81d8' 
  AND token = 'ig3eWuyFUthKQnf7nMPUoiKaPF5EIbOGhSvuCn50M9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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