SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '423827752a8631b55159e5a93c671e56246d27d256abfa235cd6b8370fabbe17' 
  AND token = 'RVTwNfEl+XRYZ8YNRUF1nS/aK2J1QWps1mkGzT24N8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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