Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '420c5dd40623af1ae2228827c364eb80a564db36345f4dcefa5e2c7498e427cd' 
  AND token = '4sCM78KHEYWD8Et1FmkxWvt0klxfdYCFqk8+mZ5B+gI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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