Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '602c3151a35fa50bf571b8a67bd21e2cfad5a20faeae3c4b3f01ac9e04b5c5b3' 
  AND token = 'DoNpqflSIQ9WrmIyf40tflsGvZogiP5lnTSzHzddsYI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}