SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '9e00f7bd2d84f9a692ae8a8a244cb03b18188c009f2c77f712fc6614a44b277d' 
  AND token = 'eKnmuwmQ2GBg/l4hjQgF17Wp/V5JyFg8ApUPInaP2VU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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