Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d06085ad0d569a253082d2cec730cf2bfc4b733abe3cdb6a870c5719c7ace4b' 
  AND token = 'Jfl+HkNqeLviegfnXWzb14U9HIIIFKUS+htwBcPUyOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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