Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c8422f913e58af7f60b2e9211c5c5fb0a56ffb5be00a18fa3a856aaec9faa7e' 
  AND token = 'RPOWXAQS5Ffizp2JoP5oPYL1CqtTn/uZuZ5KaljnNaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00076

JSON explain

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