Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1d7a57a3ec33feb35924d845b3028ff6f6b6654e2e052c12e3c8735b4ca2649b' 
  AND token = '3xiXB/VLBI33Cb/q8iz2y28ffPdDCDeP5vpJVUzZq0U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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