SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64bcdff631f1d849aa9f571a5fe6ea9af681bcf89f1fccdae0d51838e62bd881' 
  AND token = 'pu7g7wNwTLjZ1GzE5+CV/Gm/n3JXzvilHoc7b5HtnqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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