Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67ed3f0a5eda6555cffc1070c9c10a23d29fec938e5b18ba0fa8674e5cd704d5' 
  AND token = 'bR7Rb7y9hLlN20BNpzfFNpDHTqXUXVvZ6+mKe16DqUA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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