Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7c0aacae39143512a90dbfe495dff4563881bce7dc83bdb8d152466df7987f1' 
  AND token = 'McNaeoksNqW2Rxm74FRy8RIz10bzwvDXZYkK86gJFPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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