Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62236dc3a12eb66b8609f337b5749c30dc71e4526018cd24107918b5996be04a' 
  AND token = '0z3S39HnIA4Moo9QjnGaNZTw18v7//ExW8JshS4tVzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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