Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a21a2c2b4528c9d8e3ccb17413e63dc110f578e2390f9566c097bd4f45fba835' 
  AND token = 'f46u6J7xogoyQyEl5enqJeQzQSNOheD9hbBwwdTIEH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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