Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '928fcd12a8f3bbe82df53f3bd0e0faaea9187f1bf210456b8def6089787f2a9c' 
  AND token = '5BRUpc+n1fKTcJ5qVEbHgjBiK7aTIdC+Gfd1vmaYRqE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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