Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf1aa405d2307553892025563ce9cc0bf5c6eddaa07975dc48e32f7c88328197' 
  AND token = 'TFaTtDcR9fmRqdmoRzDqpPDX2d7rZDxQZpUgBzywuss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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