Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b33d5e1f045188ed1c2b33fec1151b1e4baa4249d1ef4f2590e9892238aa19d' 
  AND token = 'UjRQ8NVidm6B8DcTKGzL/hHMfWFGCYrIOC7LTBpiQY8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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