Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '9b829b4597b6dbb52dceb7b51fd0e6babfcef85af39ba27724d61fd918ebe796' 
  AND token = 'Ye1+MLKbMPAFlRq/VfYR0fm/K7SZ4VS0h2dkt9yEuPI=' 
  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"
    }
  }
}