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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'bdda8c08b423fefff30fd3e5357fa7f38be4edd523731a559026ee9562394aba' 
  AND token = 'QZWmZExPuQs7Au3FqxXKqnkbG7/wD1ZwPbrR4nW2cbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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