Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90f909e23b89de4fd725a0a63cfa3386b127ae04335c583c2b9fd4dac03cdffc' 
  AND token = 'djCIurH6TYwq85oHdPJKglyI0/2dkTU9k51EWRy9d+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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