Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3853dda09405f09ec73a7eee62aa5f27803291454f49759334aab66ef3fed18' 
  AND token = '8O60mJ99mUWFa4U0YYIsVHSXR1wwA0MklD/svzHtSsQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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