Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '5f7bc15c752ab72bb8857390c6415e4c2a254393f5907c5756e098e7392e1f80' 
  AND token = '5OSoqkCky3lKAYbSyCayYfpGdRZd7yx0+EEs5A/gUAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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