SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5eede860f0bc22aef18b91b0fd9032e24024ec4aa399d2f76704c0a1591f827c' 
  AND token = 'poqNfVLXb/+GN1XbhgQ4KlgDJyR8d+crmBqBSI0S7sw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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