Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8c4712d6f92d56112276e9dda437c8c7862d677c3e58c74652bde159daf74d6' 
  AND token = 'NJ9Uj3VUf8TQVLjz/RLAPLmoBEYTFouuewr+tJ7d+J8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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