Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0db7f3e5967751f8ad6022ff3aa901d3cc8d3a56b35f457e5ce1ac5f7caa050' 
  AND token = 'KWpbp7P585IdSCLYIBitqbs3O1PXnpvFof5RW0F2HzA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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