Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '722c1435ed2789b6fec2469e081ad8cf962c9fc7de8686eb9cf1c222920753ea' 
  AND token = 'oQ5TnlRKRBIXAPD50WLVQwgdLaX41tUcxEnMqeRQLy0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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