Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec9eee9ed36b575400d4e6b1d0285997525e3ad376549b1586dc8db97d2a809d' 
  AND token = 'li9HROHvpO+06hNs/0uxq1X4X+WJ8e9vcLy6xI1Kw1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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