Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d044df4ea45f78e500f72004eedeadc9a263ab6af870a70c0570a59c5f2a665' 
  AND token = '1LI12J5prms8pqOVEq6nnES+c0/Oq4iLYONXeKDaAv4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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