Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8a6a86e0e3151d1021651be08b420649b6044b55e93c7f95e1baa4f1648be3b' 
  AND token = 'apwGjtlpE4VLFRamUeqQHJXYvFnISeI+VUvkNFlfC+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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