Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6cebbd768bee041418fc6fe7eef106ab9bc57bb4a7f7e097c91350815e59ed07' 
  AND token = 'daNma7O2IQ4K6RLIGxqV4OhhpN+2QzNtguElZ3vjusQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}