Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ffb868c909b32bd0f2549a67f7b9bbf9f1366e2e9f01413339c30c3da9b9ef7' 
  AND token = 'ZnzpuSdiFYl+8lSk8BVKi6+UFmytZUyBpD601H9eyr4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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