Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '113199723bb2c86eb0b29844acae608da504bc3c7b122caf72e20daed6da2542' 
  AND token = '3Fgo88TB12sVfs4CP6ddWfiLpbJ0fyWfDztfDVzAc9A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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