Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e023e0ef6485e3e50c3098f7b7f706f8ca6b028ab51c565d2827ea8b3329f08' 
  AND token = 'unwo/f7dBxfd2VoERUgEtVIg3tIcQNCHM379IW1fmvo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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