Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'afedf7c98d2a4251b701d72afefcb44c893e2b0c5dfa364fccba1ca2802e54e8' 
  AND token = 'ZbeocEE+LN6QBAWAdSv4GfYVZfQmE3WBEQljAwDUbQs=' 
  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"
    }
  }
}