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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '26793c3ef4f8a95af60db5d9fb38688ff3f26f8b4725d0b97887f641b243c02a' 
  AND token = 'AV7qXuLbcvVq0WMs+P38aY4CbXF25ws2K7FEdtOVEx0=' 
  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"
    }
  }
}