Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ff52589b03fa9f6832c7d8ada0e9b328aa511215eaa58f3157011cea6d35849' 
  AND token = 'C1aAxKhjX8oR8uiHYEwKv6chrv7cWkavklLMrDWI+iw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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