SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'c4fa032f800dd73a8eb72a6d555ba5b1d307054ab42fb4658f6c18ad4aa2a2b6' 
  AND token = 'IAsjLrUGTXgiOnmv2J7T/5/zKF9xo/k8GONR5juNVEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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