Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e495bd549c61ac845203498cd0ce52f876ecab044b643fa8e1c4e16365072b7' 
  AND token = '2ljBPzf0IksCZdLtVA6bbrU6FtGOSi+YbpFMOJSDSLk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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