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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '561776a93c655162a3e1ef8e1110d0d6c9f8c10b1fad1603f209cfe0fcffd9f1' 
  AND token = 'Nuw4Cxz3npaaCBRiOM/pjRyIZJD/eXlLYyoqw2iftxk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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