Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b140b818d068ebf76787d03b3e45b263a0c0adf1aec104f4777c9b0ad26818f1' 
  AND token = 'hn3cCyqyjERNRzemq95USmwoYRrsfC/eHoo/6rh0TUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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