Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7b81f81a2ded13ba2ec34d9cfbc6057384c93ff277b93a4eecda03132ce3787' 
  AND token = 'n30efC0cwUUdtdHU0JDJQZuIpPjCmxiDRwuIMi0lYaQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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