Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '96db0394d8bdfd2429e3d4b24e392c1830842a7a2f10d1ca7ad23d229ade66ce' 
  AND token = 'zmjydqrqg7MwLrDbLe8khbWxHn80X+iQ1gpHtqdp+6g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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