Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83f9319b86324a432fddd00c22424062bc32aa6ecb6de6919c5996c22e5dbbd0' 
  AND token = 'TeOHQHwwJea/9WUklh0Flzv9xo2HEViql9iL9uzR9pA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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