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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd1dc2fb46dc82412ae07ae3396c991e86123e6cfcce00e39d750bc2e73be2c72' 
  AND token = '9X5JN4V4Z7x8hULoP+3wJXivszyVsRWuTrEy/Z9T0TA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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