Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd697cd6dd56f0839ca9defdbed89f4855c369a3fb8054233f504c8a1a60a83ce' 
  AND token = 'JVxBVXe56A2vu6nHOUlZoY61Lj5pC1+pav5QiNvdqmM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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