Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34cdd1be3b05332332de20bf85abc48eb7334ecba0b591fa7ef39e33e4bc147b' 
  AND token = 'jH/vaiHqSqD4hk39g5WdF1QgjR27nR8Fngnmv+E+i6s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00069

JSON explain

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