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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '192eb4769d8fbc460dbfb9ffacd266bd82a1a56c753c3c77a7782e6dd5ec12d5' 
  AND token = 'Fur6W0sUynoTS+hgHoAe64EcVSN5fyIEzRPjEWc5a2c=' 
  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"
    }
  }
}