Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db85c57a81fb3f6a41fddf575d5c003dea3aca74242e7b5b81a23b7eaca5793c' 
  AND token = '379KUnoJczNImFHo1C4NtdDncLja73rfD/+UgIP+L3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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