Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '1ed78394b0e6afc45a076b6a7625ddb5a488532bc073da107cab4b27d909f296' 
  AND token = 'pImU8dgbVGvF8pf8bI/cxN1Ec+p5WEDwLeC1e+H7LD8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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