SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '2b218f985fe1ecb8e942d88ee8a1b624fd22285026fd5ce233b665a924bc0351' 
  AND token = 'M1vhkaEqk/nfVaIDStGwUOAtKj9mKltUBBYzpvdl1rc=' 
  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"
    }
  }
}