Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9cb9524a4498b0e236395fd136959d4944b0948566ab7cd0faaeabf53e893402' 
  AND token = 'uvwM/E9d59aq2EwnUmgQrCRyKB8tyzBg/V5rQKifpsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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