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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e576281363b207f1d9b7e6207f86973a8900ec283e1be47e589256118fa1a4ab' 
  AND token = 'GpYNUb2pI8NvAWF7WTK8Jst+sht0N0mJkSQ4I4e6B+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00007

JSON explain

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