Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94e00730d8b573baf03a466ab4673dfbf4eafa85d7eef17ef2ade1b7c7e4b9ee' 
  AND token = 'B3+LI9f4xP2QdVSOo/j65Bj2Zeg6KSYaJYjLPLeEZeE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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