Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bb64eae4ef2d5a0e7846b5b84aabe1212f9ea80990b2f0fc3089a59b9564bf9' 
  AND token = '/IYDF62PNptY4CB30zJfUaI+vMzFjOnAJ2ni4GR9Noo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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