Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '750e0de0eb05a1e72e3137b687bfde1d70b56e672a2e8b99cfdd1b67ece32f83' 
  AND token = 'uvWY46p6BP5DLaKfKnavS5+sXHxFrufSr9Sjt9OGvi8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00068

JSON explain

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