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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '92c6fd3930dd3f5a4f5020b268702a27e392376325f411b79616dec0eb7c69dc' 
  AND token = '/j3H2JntbEDPYn/gNuDLl4YxPvwgeVTH9px0mC44pY0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00006

JSON explain

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