Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad94b4c907314a39717fef38595a684e0f6933eb37897adf02aa4fb8f1541936' 
  AND token = 'ID/tvhNihPqQxAUiqsXrANi33MdwQKCJgNL7khdZFHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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