Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5efe6a98b44266716c27c8356c811a4c9b5c91a03d67519a25cac989ffd0d621' 
  AND token = '6UxhIGVKr28puS61vMs05K+WpNv+Gd6UklV7QWsYLh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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