Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5fbfbc8bf2b9878938e253a3cca2fb60178bf5e7f19fda74cf2a3937dee5bc7a' 
  AND token = 'XxfsxR5CfD6VB7pwGRGsd5kqLLXUv10qNHEyaWCTcfY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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