Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7f7cbffa54317759efcdb9bc53729c105f9c3937548c813e85bbb69191411d8' 
  AND token = 'g/OwOq2HGS8RJDqVoWQfDg4soy3Dds8ce5Hr9ahhsIM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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