Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '380eb7de41289285d7927371da7f22d7523a6ac98c5db6c3da64eb7bbd32d2a5' 
  AND token = 'rTJ1/tWyDxzuOn2SmGVUr67AjY4KUKCIlFp0fYf/a3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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