Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44ec77b9c1715d34f7b69df0ff3f086bfcd7ec551ce79d0af815edf8e96e3c74' 
  AND token = '8jwUJcUQCFLevAYH0Ag//syMl/ZNy5NATwbuhxmMACc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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