Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '964a2809b419eaee3c32883e887fc7659412f845ab6ea4741b4140b0467c3744' 
  AND token = 'ddiEW691TAQN7Ar4S92vkcyerbANHEG0FsM4IcjSz3Q=' 
  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"
    }
  }
}