Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8df1ab3f1e75e5512eb6ab3382f3aca3f1193cf11a807062e0ae20029a5875f' 
  AND token = '6xDJ27+s0FhgXA9FyL/4afCfN5zw2p64h0IWdiPUuHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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