Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '4d2fb2f43d8cc02547486e4ac99b14c390ecd6c3bf12bb3f451eef4aa6fbc432' 
  AND token = 'QQsdu+kHWntzw62tGd5RQtIETFNLajVmDqxbgqRLcaU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}