Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '9c21ca704069553d623a5ad4caac0f947fa6502c913b979947feb17183a9bfc0' 
  AND token = 'bkxUr4KDdz6YsPoctS3xKJ9tr+tssVDWFXAyLNqkQWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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