Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '162538856412151e2e6c83e1c896bff081960c237d4de2940a24b69ad635b717' 
  AND token = 'ct4k9vymxVXXEZaH+CvwSzqclb+fsyKlyAr0BFNZsXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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