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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'bed45a08699654579a3ea02e79f9add1ecadb79f7dbf7e296db4da50b6be5cbc' 
  AND token = 'Je3KI4cujsVEJpLZ+YFU6p9+M+Mft4IDMOLnE+MK5MU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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