Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c92ca634482b43ebf98b3343f57601bf30c76520cf8207b337b1381b9c486feb' 
  AND token = 'VBzQp4D8bsgfuavGx4rtkR9Emejn60HJkg3lHEdz144=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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