Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03f3796622fa2f22dbccbc05cef4d8a0594893807bb19c1eca3ec9d310af2c6c' 
  AND token = 'QZa2hBsNyEkw35XfIuhCJuLrakhJQpF7DXUNvv8e1q4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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