Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7872b5636500b85f7dd8fd02d0f613159f0e24cb24c29c33f95a94672faae55' 
  AND token = 'XxSx82cCQeAXJiB+M/z9iBIsqp5WkV6i+oHOlo//nbw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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