Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab40ec44c983d07c12c598c76f51baa163bd2e71efb37c4afeaf25e47d6bde43' 
  AND token = 'S0PeKoglqlDQD5rtAo8ynnMqjz82yzsKiDJaMGcUnwE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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