Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '931d8a583391c47c7c4912c843760a57ed89ef390ca7d12a19159ef23a42f9c1' 
  AND token = 'oB+8rSXp2XQ3143YdW/NAftP/+NI/6kbFyM5YlSJDqw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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