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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2aa522873e210a964ae4bf7b3d22919e8c907ee8cd034df17ee94a55dc33cc2d' 
  AND token = 'Vwsasz5PYl3HtMbyiZrqOtfq3PIDRUe6RxY0pv6/9Lw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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