Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '999d7e7c15c0af8bfdfabead29399b39161d5f9313d77fe156b1baa3e21c7734' 
  AND token = 'jkro/kYrXv6uIsAOMVwHAnn2iK8rR48oubJDyP6hUCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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