Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58727e8e2ad56384653ebf7ec6919e69664b2bf2834693474a494214f2743600' 
  AND token = 'nhC4st0pUaHnXx5IHy1R25+zXmBbGBApCeefWtE6NGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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