Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c17f3a70ba9e950d753d4c2c04a7e4c74f2669a406e31612f01d9771efaddf66' 
  AND token = 'gdrbyKy4qUSGW4WivgZreTmXtVE8c6QA2KD7AivfWRI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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