Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83aef3cf71cdfc271a6b5094ba378dfc4fc7a944f320d822e007c1347fc2f434' 
  AND token = 'AmlAmejzoSYwH4z0SfpDG6kryrjm21gJYdL01DocgFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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