Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96dda0882e9e5c579e519042a353251cb7a1d9b3dc5899a38f2be0e59004d99e' 
  AND token = 'Zc4/Om+pNeaAY9uFxVqeRrarz0ZBlKlosYI6hKxGwiM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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