Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2e76119b20c9212f7846e59f00af9bafe52be209c4e68f0b64e949fe896ed38' 
  AND token = 'qBq196x8Qoub/9H4qfbaIZsPlDJ/FFZQAxJbKxkqGzI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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