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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '83eb3a19c1557708c7c1d16df7b4fc65d46a3d615b631cf41bd530cb57ec5312' 
  AND token = 'BCQoc4cJ2K8q18KNv3nhBxbWGOmTfJLwOzqeqjLkTo8=' 
  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"
    }
  }
}