SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '2c489b4613ddd648526ba973d2702ebf7fa11c058c20b835731550820322562e' 
  AND token = 'mrCcQFFBMxSlaKV+Bim/p2/QnZ+jIjhZqqGLJu8zpeY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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