Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '543777fbae096ec7b71cd72e900c38f55cb72ce819dbc4fffae3cbcf2aa36bbb' 
  AND token = 'dBynyFSszNviZgGR5WYzgWmYmI7YZHijeUbI3ykPfWc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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