Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '146aed83ec36a129912a28c445d76e00f6971e238ed7a325be83b90843f79687' 
  AND token = 'wtS0uDnzzayUHsZ7rnRpRc9Gg6d0yLBnBkamNQ3RS1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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