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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '584529fede91d12bb45c5e5ddd7d63e6b630bc757e5245be43266cd313794ec4' 
  AND token = 'ykBtY8pi5J0QJw7S18B4IoPcHtGzofW7Ls2lLh9RgrE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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