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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '4563030a861c04a8297cffa0b0862890cd4f7152d0de51e72df13cfb5529fd70' 
  AND token = 'j5cyvjsw3vbMj/ZIVS9y34WaTUe0jvU+BQy8tcS9ve4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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