Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c3280e97a08b69bd8dc194a233c7d68539377ed4c6c946527d03442a8231e21' 
  AND token = 'N6Wcg4jcI2xc/rF1/Y5QR/5BNpNpMBx2JMc6WxG3zG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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