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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '1e0f381ca7136803270876cfb8ee4fe9a15511e176276a73a9bb0e086f9b8fe2' 
  AND token = 'aoa7jr4BbbaTXwXT1Y4m42L+oJtVuVnvCjQ4gm+qBT8=' 
  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"
    }
  }
}