SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ed05e5b84019c95662a3e1b79275fd8c3c0763399fdc495f2c9ee3c3588712ec' 
  AND token = 'WzzL0gtQwAG/HY3gi0bnuY6FDJ/NzWojnHZj+ZY0Qs4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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