Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b20f8bdb566b950ffc11ad89ee2aaacbf85a0adf003005d466c114d97d0e7b28' 
  AND token = 'jVAXJSNxoRSNmvPdsQQzHjLSmf9YTl7hcwUt9zu6m6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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