Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b767fd9c3ec8d40ef4cff165c60d0c54920179db9acbf130263aeb364121899' 
  AND token = '5Bx9EOBE22SYmz94i18x5lfp4B48/BZkFgS4kchDPF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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