Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa0cca8a1674ccfa77efddd843b5834f8b0b016d6cee9674f9d28acf8a275158' 
  AND token = 'znB1KgdsxwHrSbZeB2tqeflx71wc6EgiAQS5zJlUSoY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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