Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fef0c46f823969f722a6bd0031bf21d491243a5ea65818c46caeb8d4ae3c4ab' 
  AND token = 'gs6xS307z04GgK5xpsxP3TLgg8qAlLoRpwmM5tIsC4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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