SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '7ab7b0dc0374f063f70d9c3d1ced1e1cc88adf6337aef90bc9ffe469e60a760c' 
  AND token = 'mRRGGvfToAp+zCHoqSLw/wWGQvQzOhYqbVDPgrA5vck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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