SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '119ba52f7b1f2eb693806534e83ef956718a7ac31f903ab1b72c062adb3b6cd7' 
  AND token = 'exLaTCXKvZiiJy8wG5NOkjYot7DlKK4OKYNsCygL/l8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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